/**
 * Created by Administrator on 9/29/2016.
 */
import java.awt.Graphics;
import javax.swing.JPanel;

public class Shape extends JPanel
{
    public void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        for(int i=1; i<=12; i++)
        {
            g.drawOval(150-10*i, 150-10*i, 20*i, 20*i);
        }
    }
}
